Patent GB-360639-A (GB)
Title: Braking apparatus for motor vehicles
IPC: B60T11/04
Filed: 1930-10-22
Abstract: 360,639. Brakes. JORIOT, C., Lac-ou- Villers, Doubs, France. Oct. 22, 1930, No. 31751. Convention date, Oct. 24, 1929. [Class 103 (i).] - Brakes of power-driven vehicles are applied by a driven rotating worm having a varying pitch. As shown in Fig. 1, a worm 2 on the transmission shaft 1 of a motor vehicle, is adapted to be engaged by a lever 4, 6 pivoted at 7 and connected by rods 8 to the brakes. The part 4 of the lever is. pivoted at 5 so that a roller 3 therein may be lowered or raised into or out of engagement with the worm by a frame 65 pivoted on the shaft 1 and actuated by a ramp 9<1> on a sliding rod 9 which may be connected to a hand-lever. The pitch of the worm is greater at its ends than at the middle part so that the slack in the brake mechanism is quickly taken up and a rapid increase of the braking pressure is obtained at the end of the application. As shown in Fig. 6, the driver may apply pressure directly to the brakes by a hand-lever 116 or pedal 115 connected to the lever 4, 6, but to enable such application to be prevented when the lever 4, 6 is engaged with the worm 2 the hand-lever and pedal are connected to the lever 4, 6 through a lever 112 normally coupled to a lever 117 by a pawl III adapted to be disengaged by a sliding rod 103 when this rod is moved to the position shown by the spring 104 upon disengaging a pawl 105 from a notch 106. The rod 103 when in its normal righthand position supports the lever 4, 6 disengaged from the worm 2. According to the Specification as open to inspection under Sect. 91 (3) (a) the lever 4, 6 may be engaged with the worm by a feeler device extending from the vehicle when this device strikes an obstacle. This device, Figs. 6 (Cancelled), 10 (Cancelled), and 12 (Cancelled), may comprise a number of telescopic rods 19 adapted to be extended from the front of the vehicle when desired. These rods are connected at the front ends by a cross-bar 25 which carries a second rod 27 by glass or other frangible rods 26. When by contact with an obstacle the rods 26 are broken, the rod 27 falls and by pulling on a cable 30 moves the rod 9 to engage the lever 4, 6 with the worm 2. The cable winds on a drum 31 when the rods are retracted. To cause the rods 19 to follow the steering movement of the vehicle wheels, they are pivotally mounted on carriers 23 supported on a shaft 24 carried by fixed members 20 from the frame members 21 and a rearward extension of one of the rods 19 is engaged by projections on the track-bar of the steering gear. Mechanism for extending and retracting the rods 19 comprises a shaft 32, driving through gearing 36, 37 a friction wheel 41. A forked member 46 can be swung by a cable 48, about pivot 47 to engage one or the other of two friction wheels 42, 43 with the wheel 41 thus driving directly or through gearing 70, 71 and in the one direction or the other a drum 50 engaging one of the rods 19. This rod is held up to the drum by a spring 56. The several sections of the rod are locked in extended position by spring-urged hinged members 51 on the one part which engage the adjacent rear part. A catch 53 locks the rearmost part. The catches 51 are disengaged during retraction by a member 55. The drum 50 is disengaged from the rod 19 when complete extension has been effected by the engagement with a recess in the rearmost section of the rod of a lever 58 pivoted to the support 20. When the fork 46 is raised to effect the retraction of the rods the lever 58 is withdrawn from engagement with the rod by a link 62. The feeler device may instead be of " lazy-tongs " construction. This subject-matter does not appear in the Specification as accepted.